Malicious PDF — malware analysis report

Static analysis result for SHA-256 992d2697f6c03a0e…

MALICIOUS

PDF

47.5 KB Created: 2021-05-14 15:17:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 218495f5e37f6014f5fb5c25a6a90f4a SHA-1: 3d1ee62e528ddf1a182e818238a383400339888c SHA-256: 992d2697f6c03a0e20bc347bf49c3d0e2525d1a163f7ad5b098d75ade1d0e514
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to trick users into believing they are accessing game hacks or free generators, but instead lead to malicious redirectors and a link farm. The document displays a fake CAPTCHA or human verification prompt to further entice users to click these links. The primary malicious URL identified is https://netcdn.xyz/app/431946152/easy-robux-today-com-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/easy-robux-today-com-game-hack In PDF document text
    • http://elitesoftsolutions.com/images/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-cp_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF9 27784 bytes
SHA-256: 397edc516d131ff0b7d035e96f7eac04484c7f2b3554b5a3cc18261dca0d7897
font_01_sfnt_off000088c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000095da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DA 18692 bytes
SHA-256: 73d558874ba1f93a48afe8e813aec995f67c91820d85dfc512325dae3e965bb9

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